<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>登录验证-非常重要</title>
		<script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
	    <script>
	    	function checkUname(){
	    	 username=$("#uname").val();
	    	 reg = /^[a-zA-Z0-9]{3,10}$/;
	    	 if(!reg.test(username)){
	    	 	$("#uname").css("border-color","red");
	    	    return false;
	    	 } else {
	    	 	$("#uname").css("border-color","");
	    	    return true;
	    	 }
	    	}
	    	function checkUpsw(){
	    		psw = $("#upsw").val();
	    	reg = /^[0-9]{6}$/;
	    	if (!reg.test(psw)) {
	    	   $("#upsw").css("border-color","red");
	    	   return false;
	    	} else {
	    		$("#upsw").css("border-color","");
	    	   return true;
	    	 }
	    	}
	    function checkAll(){
	    	checkUname() 
	    	checkUpsw();
	    }
	    </script>
	</head>
	<body>
		<h3>用户名是字母数字组合，3-10个；密码6位数字</h3>
	用户名<input onblur="checkUname()" type="text" id="uname" />
	 密码<input onblur="checkUpsw()" type="password" id="upsw" />
	<button onclick="checkAll()">登录</button>
	</body>
</html>